1 /* Blackfin External Bus Interface Unit (EBIU) SDRAM Controller (SDC) Model.
3 Copyright (C) 2010-2015 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "dv-bfin_ebiu_sdc.h"
31 bu32 reg_size
, bank_size
;
33 /* Order after here is important -- matches hardware MMR layout. */
35 bu32 sdbctl
; /* 16bit on most parts ... */
36 bu16
BFIN_MMR_16(sdrrc
);
37 bu16
BFIN_MMR_16(sdstat
);
39 #define mmr_base() offsetof(struct bfin_ebiu_sdc, sdgctl)
40 #define mmr_offset(mmr) (offsetof(struct bfin_ebiu_sdc, mmr) - mmr_base())
42 static const char * const mmr_names
[] =
44 "EBIU_SDGCTL", "EBIU_SDBCTL", "EBIU_SDRRC", "EBIU_SDSTAT",
46 #define mmr_name(off) mmr_names[(off) / 4]
49 bfin_ebiu_sdc_io_write_buffer (struct hw
*me
, const void *source
,
50 int space
, address_word addr
, unsigned nr_bytes
)
52 struct bfin_ebiu_sdc
*sdc
= hw_data (me
);
60 value
= dv_load_4 (source
);
62 value
= dv_load_2 (source
);
64 mmr_off
= addr
- sdc
->base
;
65 valuep
= (void *)((unsigned long)sdc
+ mmr_base() + mmr_off
);
73 case mmr_offset(sdgctl
):
74 /* XXX: SRFS should make external mem unreadable. */
77 case mmr_offset(sdbctl
):
80 dv_bfin_mmr_require_32 (me
, addr
, nr_bytes
, true);
85 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true);
89 case mmr_offset(sdrrc
):
90 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true);
93 case mmr_offset(sdstat
):
94 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true);
95 /* XXX: Some bits are W1C ... */
103 bfin_ebiu_sdc_io_read_buffer (struct hw
*me
, void *dest
,
104 int space
, address_word addr
, unsigned nr_bytes
)
106 struct bfin_ebiu_sdc
*sdc
= hw_data (me
);
112 mmr_off
= addr
- sdc
->base
;
113 valuep
= (void *)((unsigned long)sdc
+ mmr_base() + mmr_off
);
121 case mmr_offset(sdgctl
):
122 dv_store_4 (dest
, *value32p
);
124 case mmr_offset(sdbctl
):
125 if (sdc
->type
== 561)
127 dv_bfin_mmr_require_32 (me
, addr
, nr_bytes
, false);
128 dv_store_4 (dest
, *value32p
);
132 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, false);
133 dv_store_2 (dest
, *value16p
);
136 case mmr_offset(sdrrc
):
137 case mmr_offset(sdstat
):
138 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, false);
139 dv_store_2 (dest
, *value16p
);
147 attach_bfin_ebiu_sdc_regs (struct hw
*me
, struct bfin_ebiu_sdc
*sdc
)
149 address_word attach_address
;
151 unsigned attach_size
;
152 reg_property_spec reg
;
154 if (hw_find_property (me
, "reg") == NULL
)
155 hw_abort (me
, "Missing \"reg\" property");
157 if (!hw_find_reg_array_property (me
, "reg", 0, ®
))
158 hw_abort (me
, "\"reg\" property must contain three addr/size entries");
160 hw_unit_address_to_attach_address (hw_parent (me
),
162 &attach_space
, &attach_address
, me
);
163 hw_unit_size_to_attach_size (hw_parent (me
), ®
.size
, &attach_size
, me
);
165 if (attach_size
!= BFIN_MMR_EBIU_SDC_SIZE
)
166 hw_abort (me
, "\"reg\" size must be %#x", BFIN_MMR_EBIU_SDC_SIZE
);
168 hw_attach_address (hw_parent (me
),
169 0, attach_space
, attach_address
, attach_size
, me
);
171 sdc
->base
= attach_address
;
175 bfin_ebiu_sdc_finish (struct hw
*me
)
177 struct bfin_ebiu_sdc
*sdc
;
179 sdc
= HW_ZALLOC (me
, struct bfin_ebiu_sdc
);
181 set_hw_data (me
, sdc
);
182 set_hw_io_read_buffer (me
, bfin_ebiu_sdc_io_read_buffer
);
183 set_hw_io_write_buffer (me
, bfin_ebiu_sdc_io_write_buffer
);
185 attach_bfin_ebiu_sdc_regs (me
, sdc
);
187 sdc
->type
= hw_find_integer_property (me
, "type");
189 /* Initialize the SDC. */
190 sdc
->sdgctl
= 0xE0088849;
191 sdc
->sdbctl
= 0x00000000;
193 sdc
->sdstat
= 0x0008;
195 /* XXX: We boot with 64M external memory by default ... */
196 sdc
->sdbctl
|= EBE
| EBSZ_64
| EBCAW_10
;
199 const struct hw_descriptor dv_bfin_ebiu_sdc_descriptor
[] =
201 {"bfin_ebiu_sdc", bfin_ebiu_sdc_finish
,},